eSUN PLA LW Lightweight 1.75mm 1KG Foamable PLA Filament - Low Weight

In this review the eSUN PLA LW filament proves most useful for hobbyists and model makers who need very lightweight printed parts; the single biggest reason to buy is its active foaming behavior that increases part volume while reducing weight. The spool is sold as 1KG of 1.75mm filament in Natural and is aimed at projects like model airplanes, drones and cosplay where low mass and easy painting matter. The reviewer found it prints cleanly when settings are tuned and that its lightweight foaming is genuinely helpful for flight and large hollow prints.

Key Features

• High foaming ratio: Active foaming technology can expand printed volume up to about 220%, letting one spool cover more material volume than standard PLA.
• Lightweight parts: Foaming during printing reduces final part weight, improving flight performance for model aircraft and reducing load on moving parts.
• Clog-free winding: Full mechanical winding and manual inspection help feed smoothly and reduce tangles, improving the successful print rate on large builds.
• Easy to paint: The filament offers strong surface paint adhesion and a matte finish that accepts paints and finishing for display models and cosplay props.
• Adjustable foaming: Foaming and relative strength are controllable by varying nozzle temperature between 210C and 270C, which also affects extrusion settings.

Who It's For

The filament is best for hobbyists, model airplane and drone builders, and prop makers who prioritize low mass and a paintable surface; it is particularly suited to large lightweight shells and wing structures where reduced weight improves performance. Its matte finish and paint adhesion make it attractive to cosplayers and scale modelers who want an easy-to-finish surface.

Those who require rigid, dense structural parts or maximum impact resistance should look elsewhere, since some users report mixed durability and fragility compared with standard PLA. Users who need precise, non-foaming dimensional accuracy for mechanical parts should also prefer a conventional PLA.

Pros & Cons

Pros

• Very low finished part weight thanks to a high foaming volume ratio, improving aerial model performance.
• Good surface for painting with strong paint adhesion and a pleasant matte texture.
• Orderly winding and quality control reduce tangles, feeds smoothly and lowers clog risk during long prints.

Cons

• Strength is mixed in reports; foamed parts can be more fragile than solid PLA, so reinforcement may be needed for load-bearing pieces.
• Requires tuning of temperature and extrusion rate to control foaming and avoid inconsistent surface texture.

Specifications

Brand	eSUN
Material	PLA LW (foamable PLA)
Diameter	1.75mm
Spool weight	1KG
Recommended temp range	210C - 270C
Foaming volume ratio	Up to 220%

Our Verdict

For modelers and makers who need lightweight, paint-ready parts, this foamable PLA delivers good value by cutting part mass and stretching material yield; it is especially valuable for model aircraft and cosplay where weight and finish matter. Expect to spend a little time dialing in temperature and extrusion to balance foaming and strength, but once tuned it is a practical option for large, low-weight prints.

Frequently Asked Questions

Will this filament clog my nozzle?
With proper settings it feeds smoothly and the spool is wound to reduce tangles, so clogging is uncommon; keep a clean nozzle and consistent extrusion.

At what temperature does it start foaming?
Foaming begins in the listed range around 210C to 270C; users control foaming intensity by changing temperature and extrusion rate.

Is it strong enough for structural parts?
Foamed parts are lighter but can be more fragile than solid PLA, so it is best for non-critical shells and models or parts reinforced where load is expected.