US$ 24.03
135cm cross country ski poles LEKI USA - PRC 750 PINK - - All Winter Poles and since you need Messenger Backpack - Leather ftc-cerrokc-winter-kit Style:Red Clear
Messenger Backpack - Leather Hybrid Laptop Bag, Converts to Backpack – Marlondo Leather Co.
Now compare your size to the helmet manufacturer's sizing chart
ftc-cerrokc-winter-kit
Style:Red Clear
12 (width) x 15.75 (height) x 5 (depth)
and since you need all the necessary gear
US$ 24.03
US$ 22.69
US$ 29.25
US$ 21.87
US$ 24.74
US$ 22.94
US$ 29.67
US$ 28.36