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Heel Fit System
The Heel Fit System (HFS) consists of anatomically sculpted pieces of foam padding which hold the heel comfortably and securely in place to avoid unwanted movement.

Trekking boots require a snug fit around the heel area to prevent unwanted movement which can lead to excessive friction and blisters. HFS is a system of anatomically shaped high quality foam padding which helps to comfortably hold the heel securely whilst accommodating different heel shapes.

Ref. 47275 ICE MUTANT
Ice Mutant

Ice Mutant is perhaps best described as a rock shoe for ice and is designed for extremely technical ice and mixed climbing. Tested and developed in conjunction with ice climbing world cup competitors Ice Mutant gives you amazing precision in a proven and versatile package.

Product Info
  • UPPERS: Removable elastic Cordura over-gaiter with frontal waterproof zip closure. Synthetic sole for increased thermal insulation and shock absorption. Upper: one piece highly abrasive resistant Teramida, reinforced with waterproof leather. Integral padded tongue

  • LINING: Boreal Dry-Line® for total waterproofness and superior breathability. Full internal triple layer Thinsulate® for thermal protection

    WEIGHT: 840 grs./pair (size 6 UK)
                       600 grs./crampons  
  • MIDSOLE: Boreal PFC with lateral reinforcement for superior control. Unique triple layer Thinsulate® thermal protection

  • SOLE: Synthetic material with special insertion for Raptor´s “BLACK DIAMOND” competition crampons

  • USAGE: Specially designed for Ice-Climbing, Dry-Tooling and competitions.

    WEIGHT: 1030 gr. pair. Size 7,5 U.K.


  • The integrated gaiter in stretch Cordura fabric is tough, close fitting and can be removed completely. Use the gaiter when you want extra warmth or remove it for warmer conditions and an extra weight saving.

  • The upper is super warm thanks to triple Thinsulate® insulation layers which surround the foot with no cold spots and is fully lined with our unique Dry-Line® lining for guaranteed waterproofness and superior breathability. Ice Mutant comes fitted with the minimalist bolt-on Black Diamond Raptor crampons which have adjustable and replaceable mono front points and a detachable heel spurs.