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Critter Birthday Suit: Rugged Performance for the Outdoors
When you don’t want anything to freeze and fall off: The Critter Birthday Suit combines rugged, classic styling with modern, high-performance fabric technology. Built for demanding work or extended outdoor stays, this full-coverage suit delivers comprehensive protection and comfort without compromising mobility.
Constructed using a durable Polartec® fabric—such as ThermalPro for exceptional warmth, or Alpha Direct for high-output activities, or PowerDry for maximum wicking—the suit creates a thermal barrier that provides a superior warmth-to-weight ratio. Its sleeveless design ensures optimal flexibility with layering, keeping your core and legs consistently warm.
Despite its insulating power, the fabrics remain highly breathable and moisture-wicking, preventing overheating and the clammy feeling that comes from trapped sweat. Featuring two front pockets and a stand-up collar, the Birthday Suit is designed to withstand anything winter can throw at you.
Materials:
Polartec® Alpha Direct 150 with Wool (63% polyester/33% wool/4% nylon) - LIMITED EDITION
Polartec® PowerDry (100% recycled polyester)
Polartec® ThermalPro (100% recycled polyester)
Unisex Sizes:
Chest Sleeves Waist Inseam
Small 34-36” 33” 28-30” 30”
Medium 38-40” 34” 32-34” 31”
Large 42-44” 35” 36-38” 32”
XLarge 46-48” 36” 40-42” 33”
XXLarge 50-52” 37” 44-46” 34”
Features: Stand-up collar
Generous arm holes
Two front pockets
Elastic waistband in back
Shirt-style flap opening for relief
Hemmed ankles
Weight (men’s medium):
Polartec® Alpha Direct 150 with Wool - 12 ozs.
Polartec® PowerDry - 12.5 ozs.
Polartec® ThermalPro - 14.5 ozs.
Inspired, designed, and crafted with pride in Crested Butte, Colorado.
Receive a FREE Critter Funnel Neck Gaiter with every purchase.
Free Shipping in the USA. Discounted International Shipping.
Critter Birthday Suit: Rugged Performance for the Outdoors
When you don’t want anything to freeze and fall off: The Critter Birthday Suit combines rugged, classic styling with modern, high-performance fabric technology. Built for demanding work or extended outdoor stays, this full-coverage suit delivers comprehensive protection and comfort without compromising mobility.
Constructed using a durable Polartec® fabric—such as ThermalPro for exceptional warmth, or Alpha Direct for high-output activities, or PowerDry for maximum wicking—the suit creates a thermal barrier that provides a superior warmth-to-weight ratio. Its sleeveless design ensures optimal flexibility with layering, keeping your core and legs consistently warm.
Despite its insulating power, the fabrics remain highly breathable and moisture-wicking, preventing overheating and the clammy feeling that comes from trapped sweat. Featuring two front pockets and a stand-up collar, the Birthday Suit is designed to withstand anything winter can throw at you.
Materials:
Polartec® Alpha Direct 150 with Wool (63% polyester/33% wool/4% nylon) - LIMITED EDITION
Polartec® PowerDry (100% recycled polyester)
Polartec® ThermalPro (100% recycled polyester)
Unisex Sizes:
Chest Sleeves Waist Inseam
Small 34-36” 33” 28-30” 30”
Medium 38-40” 34” 32-34” 31”
Large 42-44” 35” 36-38” 32”
XLarge 46-48” 36” 40-42” 33”
XXLarge 50-52” 37” 44-46” 34”
Features: Stand-up collar
Generous arm holes
Two front pockets
Elastic waistband in back
Shirt-style flap opening for relief
Hemmed ankles
Weight (men’s medium):
Polartec® Alpha Direct 150 with Wool - 12 ozs.
Polartec® PowerDry - 12.5 ozs.
Polartec® ThermalPro - 14.5 ozs.
Inspired, designed, and crafted with pride in Crested Butte, Colorado.
