If you like to go climbing even in winter you may want to use wiregate carabiners rather than the solid gate types as the former are less prone to having their gates iced shut. A good choice would be the Omega Pacific Doval Wiregate Carabiner.
The Doval Wiregate is an extremely lightweight carabiner, weighing in at only 37 grams. This means that a climber can carry more of them before getting loaded down. A wide gate clearance, measured at 25 mm, makes clipping easy. It has a large rope-bearing surface without interior flat spots that could potentially harm your ropes.
The design of the carabiner is a cross between a D and an oval. This is why it is referred to as a “Doval”. This configuration allows the reversal of the gates after stacking them in the same way that regular ovals and Ds can be reversed.
The Omega Pacific Doval Wiregate Carabiner has a major axis strength of 25 kN with the gate closed, while this rating is reduced to 7kN if the gate is opened. The minor axis, on the other hand, has a strength of 7kN. It is 92.2 mm long, and 53.1 mm wide.