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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.


TPNet is an external TPU lattice structure which is injected into the outer fabric. TPNet is used to add support and protection to the upper whilst adding minimal weight and it allows for maximum breathability.

TPNet is a lattice of thermoplastic polyurethane which is injected into the outer fabric.

This TPU lattice creates an exoskeleton like structure which stiffness the fabric. TPNet may be used to provide ample lateral ankle support around the heel area of a lightweight boot with minimal weight. TPNet is very durable also serves to protect the underlying fabric from abrasion. Since TPNet is injected into the fabric rather than glued the bond is permanent and will not delaminate. The large holes in the TPNet lattice allow for much better breathability than traditional non-permeable reinforcement layers.

Integrated Rand System

The IRS system goes a step further in the manufacturing of climbing shoes. This one piece climbing sole never deforms and has a superior fit.
We can achieve different thicknesses in the rubber and the one-piece construction increases durability. 

The innovative one-piece sole and rand construction of the Integrated Rand System (IRS) allows Boreal to finely tune the rubber thickness around the shoe for the optimum balance of fit, performance and durability. By combining the rand and sole unit into one piece, there is zero chance of delaminating.

Tsunami Low Wmns

Weatherproof hiking shoe packed with trail running technology. A synergy of technologies, ​Tsunami is a multi-activity shoe packed with features from both our hiking and trail running ranges.

Product Info
  • UPPERS: High strength outer fabric incorporating waterproof and breathable membrane. Waterproof 1.8 mm microfiber with TPU injection for protection and reinforcement. HFS padding system for perfect support 
  • LINING: Sympatex® Moisture Tech for absolute waterproofness + stay cool breathability 
  • MIDSOLE: Boreal PLT 
  • SOLE: Vibram Ttrail. Rubber sole with integrated toecap and dual density EVA rand for optimum comfort. TPU piece for support and stability. Megagrip compound for superior grip. Boreal's patented ITR construction system to provide excellent durability prevent delamination at the toe 
  • USAGE: Trekking, backpacking, fell walking, 2-3 season use. Travel
  • WEIGHT: 710 gr. pair. Size 4 U.K.


  • Built on the outsole platform of our Saurus trail running shoe, Tsunami gives a superbly cushioned feel with excellent grip from the high friction Vibram Megagrip® rubber compound. The uppers are made from lightweight synthetic textile with a TPU injection overlay for added abrasion resistance and support. Inside you’ll find a class leading Sympatex Moisture Tech® waterproof lining for all-weather comfort, come rain or shine.
  • Tsunami feels as light and cushioned as a trailing running shoe but has all the weatherproof ruggedness and performance you’d expect from a hiking shoe.