The Classic DRY Mittsare warm, comfy and waterproof. Mitts are warmer than gloves at cost of dexterity.
Trekmates says:
Packable lightweight DRY Protect™ waterproof insulated mitt with a warm brushed microfleece.
Trekmates' Classic DRY Mitts, are great economical all rounders. Waterproof with a comfy fleece lining for warmth with separated fingers. The mitt can be cinched in to further at the wrist to retain warmth and prevent water getting in. The thumb is touch screen compatible but you would struggle to achieve much with just your thumb. The mitts can be clipped together when not in use so you are less likely to lose one.