Leki's Touring Baskets are for crossing snow fields - the large surface area helps prevent the trekking poles sink into the snow.
Snowflake Basket. Designed to keep your poles from sinking into very soft ground or snow.
Leki is the market leader for walking poles so the quality of these replacement baskets is guaranteed. They are a press fit over the trekking pole tips - they can be struggle to get on and off - best to do this at home if possible.