Seek Core 5/4 with or without a hood?

This model has no hood. If you want one built in, there is the Seek Core 5/4 Hood Front Zip.

How much warmer is it than the 4/3?

It has one extra millimetre of neoprene on body and limbs (5/4 versus 4/3), so it is the step up if you get cold in the 4/3.

Is there a back zip Seek Core 5/4?

Yes, the Seek Core 5/4 Back Zip shares thickness, colours and sizes; only the entry changes.

ION Seek Core 5/4 Front Zip Men

The men's ION Seek Core 5/4 Front Zip combines natural rubber, comfort and durability with a clean design and premium features at an accessible price.

At 5/4 mm it is the thickest hoodless full suit in the Seek Core range, for riders who want maximum warmth without stretching the budget. Front zip, black or grey, sizes 46/XS to 60/4XL plus specials ST, MT, LT, XLT, MS, LS, XLS and XXLS.