Rich Walker
Member
The different boots can seem difficult to distinguise between as the descriptions seem identical. From my understanding the derwent and the avon are the same boot the only difference being an extra insulating layer in the avons. The other design has tay, tay sport and spey. The tay is the same as the spey except for the rubber part comes higher up the tay and the spey are camo. The tay sport is the same but has the addition of a fleece lining for extra cold weather. My preference is the avon as i find them more comfortable than any of the others. Never had any problem with grip as both designs are excellent. No matter how good the grip clambering about on wet river banks always needs to be done with care.