Mossimo Flannel Shirt — Classic Comfort & Everyday Style
Our Mossimo flannel is the shirt you reach for when you want warmth without weight. We crafted it from 100% brushed cotton that softens with every wash, so it feels lived-in from day one. The relaxed cut gives you room to layer a tee underneath, and the button-front design lets you wear it open over your favorite graphic shirt or buttoned as a standalone layer.
We weave every Mossimo flannel from 100% cotton yarn, then brush both sides of the fabric to raise the fibers and create that signature soft hand. The brushing process adds warmth without adding bulk, so the shirt drapes comfortably whether you’re sitting, driving, or moving through your day.
Sizing & fit guide
This flannel follows our relaxed fit silhouette—cut with extra room through the chest and shoulders so you can layer comfortably. If you prefer a closer fit, we recommend sizing down one size; if you want maximum layering room or a looser drape, stick with your usual size.
The sleeve length is designed to break at your wrist bone when arms are at your sides, with enough length to roll and secure with the cuff tabs. Chest measurements run true to standard men’s sizing: a size Medium measures 42 inches around the chest when laid flat and doubled. Refer to our size chart on the product page for exact shoulder width, body length, and sleeve length numbers before ordering.
Layering & outfit ideas
Over a Graphic Tee
Wear the Mossimo flannel unbuttoned over your favorite Mossimo Supply Co. tee for instant casual style. The plaid adds visual interest while the soft cotton keeps you comfortable indoors or out. This combo works year-round—lighter tees in spring and summer, heavier long-sleeves underneath when temperatures drop.
Under Outerwear
The flannel’s relaxed cut means it layers easily under jackets, vests, and coats without bunching at the shoulders or armholes. We designed it to sit flat against your torso so zippers and snaps close smoothly. Pair it with denim and boots for weekend errands, or throw it under a quilted vest for a classic Pacific Northwest look that transitions from trail to taproom.
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Mossimo flannel shirt — your questions answered
Yes, the Mossimo flannel follows standard men’s sizing with a relaxed fit. If you prefer a closer, more tailored look, we recommend sizing down one size. If you want maximum room for layering base layers or hoodies underneath, stick with your usual size. Check our size chart on the product page for exact chest, shoulder, and sleeve measurements.
We pre-wash the cotton fabric during production to minimize shrinkage. You may see slight tightening—typically less than one inch in length and width—after the first wash if you use hot water and high dryer heat. To preserve the original fit, wash in cold water and tumble dry on low or hang to air-dry.
The brushed cotton provides warmth, so this flannel works best in cool to moderate temperatures. In warmer weather you can wear it unbuttoned over a tee as a light layer, or roll the sleeves for better airflow. For hot summer months, consider our lightweight poplin plaid shirts instead.
We currently offer three classic plaid colorways: red and black, navy and grey, and forest green and charcoal. All plaids are yarn-dyed for lasting color that resists fading. We rotate seasonal colors periodically, so check the product page for the latest options.
Machine wash in cold water and tumble dry on low heat. Avoid bleach and fabric softener—bleach can strip the yarn-dyed color, and softener coats the fibers in a way that reduces the brushed texture. The flannel actually gets softer with each wash as the cotton fibers continue to break in naturally.
No, this flannel is made from 100% cotton with no stretch fibers. The relaxed cut provides freedom of movement without needing elastane or spandex. If you need extra mobility for active tasks, size up or choose our flex-fabric work shirts instead.
Yes, we accept returns and exchanges within thirty days of purchase. The shirt must be unworn, unwashed, and have all original tags attached. Visit our returns page for detailed instructions and a prepaid return label. If you are between sizes or unsure about fit, our customer service team can help you choose before you order.