The fibres used to make Snuneymuxw blankets included a variety of soft, warm materials, gathered from their territory and traded from Coast Salish peoples of the Fraser River area. The mountain goat (Oreamnos americanus) is an agile, hoofed animal known for its ability to climb steep, rocky mountains. It is not actually a member of the goat family, but its ancestry can be traced to mountain sheep and alpine goats. Mountain goats once lived in great numbers and continue to inhabit the coastal mountains of British Columbia and the slopes and canyons of the Fraser River. They are not found on Vancouver Island.

A great trade in mountain goat hair went across the strait from the mainland to Vancouver Island. The Snuneymuxw traded for goat wool with the Sechelt, and many marriages between the Snuneymuxw and the Sechelt took place. The Snuneymuxw and other Salish communities on the island were eager to weave their blankets from the coveted shaggy, white coat that camouflages the mountain goat in the snowy landscape found at higher elevations. Although goats were sometimes caught and skinned, the hair was also collected in tufts, left behind on bushes and branches as the animals shed. The longer, coarser guard hairs were usually sorted out, leaving the softer undercoat for spinning and weaving.

Most blankets used a combination of goat hair and other materials, including hair from special white dogs, white duck down, and plant fibres. Softened, pounded Western Redcedar (Thuja plicata) was also used. Stinging nettle (Urtica dioica) is a plant with narrow leaves and tiny hairs that sting on contact with the skin. The stalks were collected, dried and rolled, releasing the fine, silky fibres within. A Snuneymuxw summer village site on the Fraser River was named after the abundant nettles found there. Nettle was used for making netting as well as for weaving blankets.