The 509 Raid Boa® Boot delivers the ultimate in waterproof warmth, flex, and support to earn the title of most comfortable snowmobile boot on earth.
509 developed the 509 Raid Boa® Boot for long days in the coldest conditions. From the grippy outsole to the waterproof and insulated upper, it delivers the optimal balance of flex, support, warmth, and comfort, along with maximum durability where it matters most. 509 riders claim it’s the most comfortable boot yet, and with the dual Boa® system, you can fine-tune the upper and lower zone fit with the simple turn of a dial.
Rugged high carbon outsole
5TECH™ waterproof breathable linerGenerous fit, for all day warmth and comfort
600 grams Thinsulate™ insulation for ultimate all-day warmthRaid Rubber upper reinforcements that can hold up to razor sharp running boards
Dual Boa Lacing system with quick release M3 Lace reels, and aircraft stainless wire
6 1/2 - 9
9 1/2 - 12 1/2
5 1/2 - 7 1/2
8 - 10 1/2
9 1/2 - 12 1/2
13 - 3
3 1/2 - 6
How to measure
For best results, have someone else take measurements.
Measure body in underwear.
Tape must be snug but not tight.
If measurements fall between two sizes, order the larger size.
Without shoes, standing with heels and back against a wall.
Measure under your arm, around the fullest part of your chest.
Immediately below the lowest rib.
Across the fullest part of the seat.
Hand on hip, from center back neck bone, along shoulder point, around elbow to bottom of wrist bone.
Without shoes, from crotch to the floor.
Around your head, from the center of the forehead, above the ears and over the natural bump at the back of the head.