Buffalo Systems

Buffalo Systems is an outdoor clothing brand founded by Hamish Hamilton, known for its Double P System (Pertex and pile) and products like the Mountain Shirt and O3 Jacket. The brand emphasizes rugged, uncomplicated gear for serious outdoor use, made in Sheffield.

Buffalo Systems was founded by Hamish Hamilton, who understood the wild and worked with serious outdoorsmen, soldiers, and mountain rescue teams. The brand started in a small workshop and became a trusted name among outdoor enthusiasts. Central to Buffalo Systems is the Double P System - Pertex and pile - a breakthrough pioneered by Hamish that redefined how people endured brutal conditions. Pertex was born in the late 1970s from a collaboration between Hamish Hamilton and Perseverance Mills.

• O3 Jacket

  Lightweight, breathable jacket for spring/summer with Pertex Quantum shell and Teclite micro-pile lining.

• Mountain Shirt

  Iconic shirt, with a lightweight spring/summer version called Active Lite Shirt.

1. Buffalo Systems - Still Made in Sheffield
2. Our Story – Buffalo Systems
3. Men's O3 Jacket – Buffalo Systems
4. Buffalo x Pertex – Buffalo Systems