Quick answer
Wear the Lachine Rain Jacket as your outer shell over a thin base layer and, in cold weather, a light midlayer—then wash it with technical cleaner and tumble dry low to reactivate its water repellency. Choose your regular size for a relaxed, slightly oversized feel, or size down for a cleaner, classic fit.
Why layering under a rain shell is different
A rain jacket traps warmth, so the layers underneath need to move moisture away rather than hold it. Start with a synthetic or wool base layer that feels thin against your skin, add insulation only when you will be standing still or the temperature drops, and keep the whole stack close to the body so the jacket's relaxed fit does not become a cold, flapping shell.
The Lachine Rain Jacket is fully seam-sealed and made with waterproof, breathable fabric. That breathability only works when the layers underneath are not soaked with sweat, which is why a cotton T-shirt is a poor first layer on an active wet day.
The fit decision changes how you layer
The Lachine Rain Jacket has a relaxed fit. If you plan to wear a midlayer most of the year, your regular size leaves room for a thin fleece or sweater without compressing the insulation. If you mostly wear the jacket over a single base layer and want a cleaner line, size down for a classic fit.
Check the shoulders and cuffs before you commit: the jacket should let you raise your arms without the hem riding up, and the cuffs should sit at your wrist without gaping. The Lachine packs down easily, so it is also worth testing how small it rolls in your bag if you plan to carry it as a just-in-case shell.
Care trade-offs worth knowing
Washing a rain jacket is not the enemy of waterproofing—dirt and body oils are. The outer fabric's durable water repellent (DWR) finish needs a clean surface to bead water, and heat from a low tumble dry helps reactivate it. Avoid fabric softener and high heat, which can coat or damage the fabric and seams.
If water stops beading and the fabric starts to look wet through, clean the jacket first, then consider a DWR refresh product. The Lachine's catalog does not specify a re-proofing product, so follow the care label and the cleaner manufacturer's instructions rather than guessing.
Step-by-step: layer and care for your Lachine Rain Jacket
- Start with a moisture-moving base layer: Put on a thin synthetic or wool base layer before anything else. Common mistake: wearing cotton as a first layer, which holds sweat and makes the jacket feel clammy even when the fabric is breathing. If you will be active, choose the thinnest base layer that keeps you comfortable at rest.
- Add a midlayer only when you need warmth: For cold, wet days, add a light fleece or sweater under the Lachine. Check that the jacket still closes comfortably over it and that you can move your arms freely. Common mistake: stacking a bulky midlayer under a relaxed shell and compressing the insulation. Test the full stack with the jacket zipped before you leave.
- Choose your size based on the layers you actually wear: Pick your regular size if you want a relaxed, slightly oversized feel with room for a midlayer. Size down if you mostly wear one thin layer and prefer a cleaner, classic fit. Common mistake: sizing up to fit a heavy sweater, which leaves the shoulders and cuffs too loose. Try the jacket on over the midlayer you plan to wear most often.
- Close the shell before you head out: Zip the front, fasten the cuffs, and adjust the hem so the jacket sits where you want it. Common mistake: leaving the front open in steady rain, which lets water run onto the inner layers. A quick mirror check for gaps at the neck and wrists takes seconds.
- Wash with a technical cleaner when the fabric looks dirty: Follow the care label, use a technical cleaner rather than regular detergent, and skip fabric softener. Common mistake: washing only after the jacket stops beading, when dirt has already masked the DWR. Clean the jacket before you judge whether it needs re-proofing.
- Tumble dry low to reactivate water repellency: After washing, tumble dry on low heat as the care label allows. Heat helps restore the DWR finish. Common mistake: using high heat, which can damage the fabric and seams. If water still soaks in after cleaning and low drying, apply a DWR refresh product according to its instructions.
Product facts
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Lachine Rain Jacket: The Lachine Rain Jacket is fully seam-sealed with waterproof, breathable fabric and a relaxed fit. Sealed seams block water at the stitching, and the relaxed cut leaves room for a thin midlayer without sizing up.
Lachine Rain Jacket
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Lachine Rain Jacket: The Lachine Rain Jacket packs down easily. You can keep it in a bag for changeable forecasts without giving up much space.
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Lachine Rain Jacket: Fit note: choose your regular size for a relaxed, slightly oversized feel, or size down for a cleaner, classic fit. Your layering plan should decide the size, not the other way around.
