SPC Sorbo Silicone Rubber
Silicone rubber has the advantage that it is self-lubricating, so it's always silky smooth. Soft and resilient it does not harden in cold conditions, and will remain fresh indefinitely.
The 15m (50 feet) roll eliminates the need to stock different sizes, just cut to the size you require.
Note: This is an extruded silicone rubber, not a moulded natural rubber. It is self lubricating, and for best results, wipe the blade at the start of each working day.