Black Diamond Spark Mitts vs Marmot Women's Warmest Mitt

Not at all waterproof. Warm, comfortable, NOT waterproof. Take incredibly long time to dry, even on a forced air, heated boot dryer. If you use these, you will need a pair of spare mitts to use while this pair dries

This mitten is insulated with primal off. It's a lightweight synthetic insulation and there's a real thick layer of it in there so it's just gonna be ...

They were not too tight as to get cold and they were not too sloppy as to feel limited in mobility/ dexterity. On a cold day at the resort (15degrees F), my hands did get surprisingly cold for having mittens. But now i know the lower limit of the mitts and know not to wear them in cold weather. For fair weather, they are the perfect mitt though

Following the sizing chart, I purchased a small based on my measurements. I was disappointed to find that the mittens were far too small, primarily in the thumb. But also butting up at the tip of my fingers. I teach nature preschool in northern MN, and typically were thin gloves under my mittens