Bottari grip sock evolution anti skid traction device for tyre size 195 55 r16 the grip sock evolution snow socks are super strong textile socks which you slip over the drive wheels to provide the grip you need on ice and snow theyre reusable easy to fit take up minimal storage space and are perfect for our sporadic winter conditions the grip sock evolution is tailored for situations where the duration of icy snowy roads is normally short and does not justify special tyres or snow ch