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Sibley 450 Ultimate Complete Description

Sibley 450 Ultimate

Introducing the Goldilocks of Sibley bell tents!  Specifically designed for that camping family or glamping couple looking for the perfect balance of features, weight, and space; look no further than the brand new Sibley 450 Ultimate! Not too big, not too small, the 450 is just right!  A queen bed fits nicely in ¼ of the tent, giving you ample room for guests, gear, dogs, tables, chairs, and lounging.  

Free shipping and fast delivery to the US and parts of Canada!


CanvasCamp took the classic bell tent design and packed it with features focusing on ease of use, comfort, style, and versatility.  The Ultimate checks all the boxes for family camping, luxury camps, casual glamping, festivals, garden parties, car camping, back yard lounging, and three season use. 

The rip-stop, water and vapor impermeable groundsheet attaches to the tent with a burly size 10 zipper that runs a full 360 degrees around the perimeter.  Giving you the ability to roll up the canvas side walls and let the breeze in, or remove the floor completely for transport, cleaning, storage, or to feel the grass between your toes!


The Ultimate groundsheets are durable, thermally welded, 15.9oz/yd² ripstop PVC.  Completely water and vapor impenetrable, the ‘bathtub style’ floor rises 4 inches high to keep you dry even in standing water.  Using a heavy duty size 10 zipper to attach the sidewall to the groundsheet, you can unzip the floor to roll up the canvas walls for maximum ventilation, or remove the groundsheet entirely for transport, storage, cleaning, or to enjoy the grass or sand beneath your feet.  A tail gate style system of secure hooks and eyes allows you to drop the bathtub wall near the door and peg it flat to prevent tripping and facilitate easy cleaning.

Spring Loaded Poles

The durable nickel plated steal poles have internal spring loaded wires that guide the pole sections together for quick and easy assembly. The center pole has a welded lanyard ring which can be used to hang an inner tent or chandelier.

A-frame Door

The Sibley’s signature A-frame door allows for easy entry and exit, and holds the canvas at 90 degrees from the ground preventing rain from falling into the tent when moving in and out.  Spring loaded poles snap together quickly for easy set up and fold together for fast take down and organized storage.  The floor is equipped with two stirrups which hold the foot poles of the A-frame securely in place.  The top of the A-frame door is equipped with a pin that sits in a grommet at the peak of the door ensuring proper placement.  A rain cap is then placed over the pin and grommet to keep rain from running down the poles.  The canvas door zips together vertically and along the bathtub floor. Each side of the door is equipped with loops and ropes to neatly tie back the canvas for easy access.

Every Sibley is compatible with a Sibley Connector, a bow-tie shaped attachment that can be used as an awning.

Windows and Vents

Every Sibley comes complete with windows and vents covered in no-seeum mesh to keep the bugs out while providing ventilation and airflow.  The half moon windows have zip up covers to allow you to customize your desired level of ventilation and privacy.  Each window is equipped with loop fasteners to neatly hold the covers when the windows are unzipped.

Durable Guy Lines and Tensioners

The Ultimate series comes with 3mm guy ropes that will need to be tied on before your first pitch.  Check out the assembly instructions at the bottom of this page to get a feel for the initial set up process.  The PRO Series comes with pre-attached guy lines and tensioners for those customers looking for an out-of-the-box set up.    Plastic tensioners prevent edges from cutting into the guy lines and prolong the life of your tent.

Steel Stakes and Pegs

The Ultimate stakes and groundsheet pegs are designed for easy insertion and removal from average earth, like grass or forest floor.  For pegging a groundsheet to especially hard or rocky soil, D60 nails are cheap, easily sourced, and can be placed and removed with a standard claw hammer.  If your application requires the heavy duty stakes for hard, rocky, or frozen ground, check out the PRO Series.

Ultimate Canvas

The 9.4oz/yd² army duck canvas on the Ultimate, Deluxe, and Free series is the perfect balance of performance and breathability.    The proprietary Ultimate treatment enhances the natural water resistance of canvas, along with a light UV and mold resistance.  The Ultimate is ideal for casual camping in mild to moderate environments for three season use.  Repariable and retreatable, a properly maintained Ultimate can last for years and years.  Double stitched, flat-felled roof and side wall seams, seam gussets, and double-layer construction at all stress points create a bell tent that is as durable as it is beautiful.  For more extreme climates, four season, or long term use check out the PRO series.

Cotton canvas provides a natural waterproofing and breathability.  Cotton fibers swell when damp, the tight weave prevents rain from penetrating and the surface tension of moisture on the outside combined with the angle of the canopy allows water to run off.  Moisture held in the air on the inside is still able to escape directly through the fabric, keeping internal humidity low and mitigating condensation.  Check out the FAQ for more information than you could ever need to know about Cotton Canvas and proper tent maintenance. 


The canvas is exclusively 100% cotton.  Cotton is made from the seed hair of this hardy and drought tolerant plant. Sustainable, renewable, and one of the most biodegradable fabrics on earth.  The canvas is a soft, natural, earthy beige that glows inside and out with natural or artificial light.  CanvasCamp is the only tent manufacture to carry the official Seal of Cotton®.

Stove Compatibility

All CanvasCamp tents are easily adaptable to fit a modular stove jack for a tent stove.  Proper stove placement is dependent on stove size, desired temperature, and intended use; thus we provide you the advice and systems to place a stove in best location for you.  Simply cut a hole in your desired flu exit location and screw on the stove jack.  Contact us to learn more about the best stove placement for your desired application.  Not for use with open fire pits.  We encourage you to be vigilant about fire safety and are happy to answer any questions or concerns you may have.  CanvasCamp or Fest Head Depot cannot be held liable for any damage or injury to persons or property resulting from the use or misuse of fire or flammable materials in or around CanvasCamp tents.

14 day money back guarantee.  Check out our warranty and return policy in our FAQ for more information.


To compare Sibley sizes and series check out our comparison chart.

Size and Weight

  • Diameter: 14 feet 9 inches
  • Center Pole Height: 9 feet
  • A-frame door height: 5 feet 5 inches
  • Door width: 6 feet 6 inches
  • Floor space: 171ft2
  • Side Wall Height: 2 feet
  • Weight: 64lbs
  • Boxed Dimensions: 40"x12"x12"


  • Zip in/out bathtub style groundsheet
  • Roll up canvas side wall
  • Spring loaded poles for easy set up
  • Durable ropes, stakes, and poles

Facts and Stats

  • 1 Person Pitch time on grass: 15 minutes
  • Wind Resistance: up to 65mph
  • Sleeps 3 ‘glamping’ style on 1 queen and 1 full
  • Sleeps 6 ‘camping’ style on 6 sleeping pads
  • Compatible with Stove Jack, Sibley connector, chandelier, and coat rack



  • 15.9oz/yd² ripstop PVC bathtub floor, zip in/out, completely removable, 4” high
  • 9.4oz/yd² 100 % cotton canvas.  Lightly treated for water, UV, and mold resistance for maximum breathability.
  • 1” spring-loaded nickel plated steel center pole with rubber feet
  • 3/4” spring-loaded nickel plated steel A-frame pole with rubber feet
  • 14 3mm guy ropes with tensioners, must be tied on for first pitch
  • 14 steel stakes
  • 13 ground sheet pegs
  • 4 no-seeum mesh covered peak vents
  • 4 no-seeum mesh half moon windows with zip up canvas cover
  • Cotton canvas carry bag
  • Pole and stake bags
  • Pole spring repair kit

Warranty information

CanvasCamp stands by its products.  All CanvasCamp tents sold as new at retail value come with a limited lifetime warranty to the original purchaser against manufacturing defects. Any tent found to be defective will be repaired to working order or replaced with the same or similar model at the discretion of CanvasCamp.

This warranty does not cover damage arising from mold, mildew, inconsequential spot leakage, pole failure not caused by defective workmanship, ultraviolet exposure, fire, stove/air conditioner use, improper use/assembly/storage, or inclement weather conditions including but not limited to ice, snow, hail, wind, and lightening. This warranty is void with modification, alteration, or the use of certain cleaning, treatment, or coloring agents. CanvasCamp makes no other warranty express or implied and shall not be liable for consequential or incidental damage or injury arising from the use of CanvasCamp products. This warranty gives you specific legal rights. You may have other legal rights that vary from state to state.


Which Sibley is right for me?

To compare Sibley sizes and series check out the comparison chart  below.  

As a Sibley tent is round and most outdoor equipment is square, CanvasCamp recommends that you err on the side of caution when calculating how much square footage you need. That said, the Sibley 300 is 75ft², or the equivalent of a 9'x8' room. The Sibley 400 is 133ft², which is the equivalent of an 11'x12' room. At 210ft², the 500 models are the equivalent of a 14'x15' room, while the Sibley 600 model is a whopping 304ft² or the equivalent of a 18' x 17' room!

When trying to decide which series Sibley you need, consider it's intended application. Is the application strictly personal, or commercial? Is it for the back yard or the wilderness? Will you be carrying it on foot or will it be transported? How much space do you need? How long will you leave it up? What CanvasCamp accessories do you require compatibility with?

Sibley Ultimate series: Our lightest fully-featured series
  • Zippered-attached PVC bathtub floor
  • Side walls roll up
  • Compatible with our Inner Tents and Exit I stove jack

Sibley Pro series: Our finest, most rugged series, packed with features.

  • Great for commerical applications, long term use, and extreme enviornments.
  • Heavy-duty zipper-attached rip-stop PVC bathtub floor
  • Side walls roll up
  • Guy lines come attached to the tent
  • Heavy-duty stakes, poles, and guy lines
  • Improved canvas material
  • Compatible with our Inner Tents, Screen Door and Exit I stove jack

Sibley ProTech series: Our Pro series, with an additional mesh wall.

  • Great for commeical applications, long term use, and extreme enviornments.
  • Heavy-duty zipper-attached rip-stop PVC bathtub floor
  • Zip in/out mesh side wall for 360 degrees of ventilation and bug protection.
  • Side walls roll up
  • Guy lines come attached to the tent
  • Heavy-duty stakes, poles, and guy lines
  • Improved canvas material
  • Compatible with our Inner Tents, Screen Door and Exit I stove jack
  • A Sibley 300 can weigh more than some Sibley 400's due to the steel frame. 
  • Some of the Sibley 600's weigh in excess of 100lbs. 
  • The 400 models are perfect for couples who want space 
  • The 500 models are perfect for families 
  • The 600 models are larger than the largest room in most homes