Peter Storm 1998 cream W1 proofed wool popcorn knit waterproof beanieA cream wool beanie by british outdoor company peter storm (1998), made in a variation of their "715" watchcap style. It is knitted in a 'popcorn knit' style, appearing like bobbly circles with small gaps in between. The beanie has been treated with peter storm's W1 proofing, which makes the surface of the beanie waterproof without reducing wool's absorbent qualities. A 2002 peter storm product list describes the 715 watchcap beanie as follows: