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Waterproof kids’ rain bib pants with welded seams, made for puddles, mud, wet snow, outdoor school, and layering over warm clothes.
Find Your Size
European sizes are based on your child’s height in centimeters. Because kids of the same age can be different sizes, height is the best guide for fit.
Enter your child’s height in inches, and we’ll show the closest EU size range.
💡 Tip: These are general guidelines. Always check specific brand size charts when possible, as sizing can vary between manufacturers.
Product Description
If you want kids to stay outside longer when the ground is wet, start with what they are wearing from the waist down. The Reima Lammikko Kids Waterproof Rain Pants are made for the kind of play where children sit in puddles, kneel in mud, crawl through wet grass, splash through slush, and explore without worrying about keeping their clothes clean.
Reima rates the Lammikko for active outdoor play in very wet conditions, including heavy rain and wet snow. Waterproof material and welded waterproof seams create a practical outer layer for outdoor school, nature preschool, backyard play, creek walks, and everyday rainy adventures.
Because the Lammikko works as an outer rain layer, families can change what goes underneath as the seasons shift. Wear them over everyday clothes on mild rainy days, add fleece or base layers when it gets cooler, or layer them over warmer pants when snow turns wet and slushy.
That flexibility is what makes good rain pants so useful. One waterproof outer layer can help extend outdoor play across rainy fall mornings, muddy spring days, wet snow, and everything in between.
Pair the Lammikko with the Reima Lampi Rain Jacket for a complete waterproof rain set built for real outdoor childhoods.
Why Parents Love It
- Waterproof for very wet play: Reima rates the Lammikko for active outdoor life in heavy rain and wet snow.
- Welded waterproof seams: The seams are welded to help keep water out while kids sit, kneel, crawl, and splash.
- Made for puddle-level play: Reima specifically designed these rain pants for the kind of wet-weather adventures where kids end up right in the puddle.
- Easy to layer: Use them over everyday clothing or add warmer layers underneath as temperatures change.
- Helps extend outdoor time: Waterproof coverage gives kids more freedom to explore wet grass, mud, puddles, slush, and rainy playgrounds.
Built for Real Outdoor Use
Kids do not experience rain from a standing position. They squat beside puddles, sit on wet logs, kneel to inspect bugs, crawl into forts, slide down damp hills, and somehow find the muddiest patch on the entire playground.
Lammikko rain pants are made for that.
Pull them over the clothes kids are already wearing and let the outer layer take on the puddles, mud, wet grass, and slush. On colder days, add warm layers underneath. When snow pants need extra protection from wet spring snow or messy slush, a waterproof outer layer can also help keep play going when conditions turn soggy.
It is one of the simplest ways to make rainy weather feel less like something to work around and more like another kind of outdoor day.
Make It a Set
Pair the Reima Lammikko Rain Pants with the Reima Lampi Rain Jacket for a complete waterproof rain set.
- Lammikko Rain Pants: Waterproof lower-body coverage for sitting, kneeling, crawling, splashing, and muddy play.
- Lampi Rain Jacket: Waterproof upper-body coverage with welded seams for heavy rain and wet snow.
- Better together: The matching jacket-and-pant setup creates practical head-to-boot rain protection for outdoor school, nature preschool, camps, and everyday family adventures.
Things to Know
- Designed as an outer layer: Adjust warmth underneath depending on the season and weather.
- Great for cooler wet days: Add fleece, base layers, or warmer pants underneath when temperatures drop.
- Made for very wet conditions: Reima rates the fabric for active outdoor play in heavy rain and wet snow.
- Roomy fit is commonly reported: Reima’s current customer-review summary notes that many families appreciate the generous fit and room for growth, though some find it larger than expected.
- Complete the set: Pair with the Reima Lampi Rain Jacket for coordinated wet-weather coverage.
Product Details
- Product: Kids’ waterproof rain bib pants
- Brand: Reima
- Model: Lammikko
- Waterproof rating: Water column over 10,000 mm
- Seams: Welded for waterproofness
- Best for: Heavy rain, puddle play, mud, wet grass, outdoor school, nature preschool, wet snow, slush, and everyday outdoor adventures
- Pairs with: Reima Lampi Rain Jacket
Bulk Ordering for Schools & Programs
Outfitting an outdoor school, nature preschool, childcare center, forest program, camp, or classroom? ODSS offers bulk ordering for schools and programs, making it easier to build a practical rain-gear system across multiple sizes.
The Lammikko is especially well suited to group settings because it is a simple waterproof outer layer that can be used over different clothing as conditions change. Pair it with the Reima Lampi Rain Jacket to create complete rain sets for your program.
Contact ODSS for bulk-order availability, sizing support, and help building Lampi + Lammikko sets for your school or group.
Why ODSS Recommends It
If there is one thing that changes how long kids can comfortably play outside in wet weather, it is giving them permission—and the right gear—to get all the way into the mess.
Rain pants make that possible. Kids can sit in the puddle instead of walking around it. They can kneel beside the creek, dig in wet sand, make mud pies, crawl through damp grass, and stay engaged in the kind of hands-on outdoor play that makes rainy days memorable.
We especially recommend the Lammikko because it works as a versatile outer layer and pairs naturally with the Lampi Rain Jacket. Together, they create the kind of dependable rain set we love for outdoor schools and family mudrooms alike.
Add boots and rain mittens, and kids are ready for the puddles, the mud, the wet snow—and another hour outside.
Product Features
Materials & Care
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Washing Instructions: Wash separately inside out. Do not use detergents with bleaching agents. Do not use fabric softener. Remove the garment after finished washing program to avoid color change. Dry in room temperature.
100% polyester, polyurethane coating - Country of Origin: Imported
- Style No.: #5100026A
Pairs well with
How this gear performs
Each piece is rated for protection from water, wind and performance during play

Frequently Asked Questions
Is Reima PU rain gear truly waterproof?
What’s the difference between PU rain gear and breathable rain gear?
Is Reima rain gear safe and non-toxic?
Should rain gear fit big for layering and growth?
How do I care for Reima PU rain gear?

FOUNDED BY WOMEN. BUILT FOR ADVENTURE.
ODSS was started by mothers who saw firsthand how time outside builds resilient, confident kids. What began as helping outdoor schools equip students for all-weather learning grew into a bigger mission: Help families raise resilient, confident kids by making it easier for children to stay outside longer.
Testimonials
For us, the right gear from ODSS supports what we believe most about childhood. When children are able to be outside every day, in all seasons, they become tenacious, confident, and develop an authentic relationship with the land.
— RAIN OR SHINE SCHOOL
Working with Outdoor School Shop has transformed our outdoor school community. Parents love knowing their children are consistently and reliably equipped—and that nothing is forgotten or comes home covered in mud.
— RANDOLPH SCHOOL
Our students get outside in all temperatures and having the right gear makes a world of difference. @outdoorschoolshop has gear appropriate for all seasons, has a directory to search for nature schools, and layering guides to help families know how to dress children for the weather
— HEMLOCK HILL
At The Thistle and Root, I always recommend ODSS gear for anyone who believes that children grow best through nature—so dress for it.
— THISTLE & ROOT
Ordering bulk with Outdoor School Shop was just as easy and seamless as I had hoped! As we open up a new program, preparing our first group of kiddos for any weather was at the top of our priority list, and ODSS came through with insight, expertise, and the coolest, most dependable gear around! Thank you ODSS!
— SIDNEY RIDGE

