- New Seamless Leading Edge
- Excels in the BASE environment
- Easiest & most comfortable high-performance suit
- Near C-RACE performance with FREAK-series comfort






C4 VIDEOS
HIGH ASPECT RATIO INLETS
The new High-AR Inlet builds on the industry-changing innovation of our 3D inlet, with improved intake efficiency and less drag. The aerodynamic shape, finely tuned size, come from our performance R&D.
NEW SEAMLESS LEADING EDGE*
Our proprietary leading edge Glide Skin now wraps more of the forward wing chord (*patent pending).
INTEGRATED PROFILE GRIPPER
Increases lifting surface without increasing the total surface area of the suit, while placing the pilot's hand in a more natural location. Result: Increased performance and comfort from the same amount of surface area – a “free” upgrade.
CUSTOM INTERNAL PRESSURE
All of our suits allow you to choose the amount of internal pressure in the arm wings. Choose from full pressure for maximum performance, or reduce it for easier maneuvering in acro / freestyle flight.
AIRFOIL CROSS SECTION
Designed for Performance or Freestyle, the removable airfoil cross section adds glide and speed performance and increases agility and range in any suit that it is added to. More information on leading edge foam. More information on leading edge foam.
MORE POCKETS
More pockets! More snack-holes! Every Squirrel wingsuit gets an inside-arm pocket for sunglasses, a phone, your FlySight, or anything you want to hide from the rest of the world.
NEW NUTSACK
Don't be fooled by the shallow depth of this nutsack - it actually holds a lot of equipment. The new nutsack is a flexible hammock which allows more storage and also keeps items higher & closer to your CG.
LIGHT RIBS
Lightweight, durable, and more stable than mesh, Porcher Sport Skytex is renowned for its mechanical stability. Helps to reduce overall weight and pack volume.
ONE-ZIP ATTACHMENT
The new One-Zip system more durable and easier to use! It's cable free, and protects the zippers from being damaged by harness laterals. And it attaches to your rig in seconds. The adjustable lateral slot accommodates a range of harness types and sizes.
EVOLV TRAX RUBBER BASE SOLE
The new TRAX Super Sticky BASE Sole has been developed in cooperation with Evolv, a leading climbing shoe manufacturer. The tread pattern is designed specifically for exit force traction, and the rubber is sticky in all conditions: wet, dry, warm, and cold. This mold is the only custom wingsuit sole ever created and is the highest performance option available.
MASSIVE LEG WING POCKET
The new leg wing pocket is the full width of the end cell, has zip closure, and is ideal for the stowage of hiking poles, ropes, and other equipment.
AIRTIGHT CONSTRUCTION
All of our suits are built to the most exacting specifications, and tested for airtight symmetry in our production facility at multiple points along the construction process.
HOOK KNIFE
Our sturdy double-blade hook knife fits into a secure pocket on the front of the leg. It's light, strong, and easy to grab.
MAGSNAPS
New magnet snaps require no pressing action to attach and securely lock together until they are intentionally lifted upwards to separate. Sometimes it's the little things...
Our mission for this suit was to put as much performance from our competition line as possible into an upper-intermediate category design. If you are intrigued by high performance suits but still want intermediate level comfort and passive safety, then the C4 has what you're looking for.
The C4 is not designed for freestyle flying. If you are interested in an all-around fun suit, then we recommend the FREAK series. The C4 is for performance flying in the skydiving and/or BASE environment.
COMPARED TO THE FREAK SERIES:
COMPARED TO THE C-RACE:
MAIN SURFACES
Our main surface fabric is a 210D Rip-stop, with low stretch and an ideal rigidity-to-comfort ratio. Its balance of weight / durability, along with mechanical stability and tear strength, makes it the perfect mid-weight material for wingsuits.
LEADING EDGE MATERIALS
We offer two choices for wing surface Mylar reinforcement:
INTERNAL RIBS
All ribs are constructed from lightweight sail cloth, chosen for its ideal stability-to-weight ratio.
ZIPPERS
SQRL wingsuits are constructed with the strongest and highest quality zippers available. Locking YKK 10C zips are used on the main body, harness-interface, and arm sections of every suit we make.