Info from supplier:

Peeled, frozen & ready to rock. Beats all the faff of blanching and peeling as its all been done for you.

Cooking Instructions:
Raw chestnuts do not need to be cooked to be eaten, but when cooked become tender and sweeter. Frozen chestnuts may be placed directly into boiling water, but should be thawed before baking or roasting.

Important Information:
These cooking instructions are a guide only. Your appliance may have a different power rating, so please adjust accordingly
Keep frozen at -18C
Do not refreeze