Sea to Summit Primaloft Extreme Liner Mitts

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A lightweight, ultra-warm layer built to handle the coldest days and long alpine breaks.

Hestra says: 

A sturdy warming liner glove with Primaloft Gold synthetic insulation that keeps hands warm in severe cold. Combines with a shell glove, such as Hestra’s Seam Sealed Mitt or Pull Over Mitt. Also practical as an extra liner, e.g. for the Army Leather Expedition Mitt, if you want to be able to swap liners over the course of the day. Primaloft Gold produces a down-like feel and binds a lot of insulating air while letting moisture escape.

Our Verdict

The Hestra Primaloft Extreme Liner Mitts are a top-tier option for extreme cold, offering impressive warmth without excessive weight. Packed with Primaloft Gold insulation, they create an excellent warmth-to-weight ratio, with extra insulation on the backhand to trap heat where it’s most needed. Made from water-resistant, windproof fabric, they do well at keeping out the elements, although they’re best paired with a shell glove for maximum protection in wet or windy conditions.

While these mitts don’t include a cuff cinch, they function like a down jacket for your hands—ideal for slipping on when taking a break, trapping warmth without needing to be overly snug. The mitts’ bulk somewhat reduces dexterity, so they’re best suited for low-movement periods rather than active tasks. Some might require a larger-sized shell glove to fit these liners comfortably.

These mitts are a warm, reliable layer for those needing serious insulation in challenging winter conditions.

– Reviewed by Ultralight Outdoor Gear

Features

• Durable and weather-resistant ski glove.
• Waterproof and breathable CZone membrane.
• Backhand featuring durable, weather-resistant polyester fabric.
• Impregnated goatskin provides durability and good grip.
• Warm synthetic insulation (Primaloft Gold).
• Liner featuring soft polyester fleece.
• Velcro wrist adjustment.
• Elasticated wrist.
• Attachment for Hestra handcuffs (wrist strap).
• Waterproof
• Windproof

Specifications

• Small/Medium (7 inch) pair weighs: 147g
• Medium/Large (9 inch) pair weighs: 176g
• Large/XLarge (11 inch) pair weighs: 193g

Sizing

• 7 inches: Hand circumference 178mm, hand length 171mm
• 9 inches: Hand circumference 229mm, hand length 192mm
• 11 inches: Hand circumference 279mm, hand length 215mm
• Please see our size guide for more information on sizes.

Material & Construction

• Outer Material: Impregnated goat leather, Hestra niak polyester fabric (Polyester fabric with softly brushed surface. Windproof, waterproof and breathable fabric. 100% polyester.)
• Attached Lining: Brushed polyester (Durable lining with a soft feeling. The brushed surface binds more air which provides a better insulation. 100% polyester.)
• Insulation: Primaloft Gold (A soft, down-like insulation with breathable and warming properties. 100% Polyester.)

Help & advice:

• Choosing Winter Gloves