Denim in loungewear still feels like a bit of a departure from the usual checks, and that's exactly the appeal - ash grey keeps it understated rather than workwear-heavy. This full-sleeve set is cut from Tencel denim, a fabric that looks like denim but feels closer to your softest T-shirt - light, breathable and easy enough to lounge in all day, not just sleep in. Machine washable, holds its wash-worn look over time. A twinning pick for a mom and son who'd rather their set look a little less "pajama" and a little more "off-duty."