100% copper or copper plated aluminum?

I looked at the wire strands where they are crimped to the copper jaws. Cannot see any aluminum in the strands. I cannot say for sure they are pure copper though. I can say the cables appear high quality. The case as well. Cost is lower than any advertised as 100% copper. Your decision to make.

Are these rubber and will the remain flexible during the northeast winters?

Yes the insulated cables are nice. They should last winter weather conditions. I live in Chicago area, winters can be bad but the i did order another jumper cable case because once I took cables out of the current case it was very difficult to put cables back in case.

There are conflicting answers to whether the wires are 100% copper or plated aluminum. Can anyone confirm? Packaging shows a picture of copper wires.

I would say copper. Hope this helps

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⚡ Jumpstart your drive with power and confidence!

POWER UP FAST - 4 gauge thick cables deliver rapid, reliable jump-starts when every second counts.
TIDY TRAVEL READY - Includes a rugged carrying case for organized, tangle-free storage on the go.
REACH WITHOUT LIMITS - 16-foot length lets you connect vehicles effortlessly—no awkward repositioning needed.
UNIVERSAL COMPATIBILITY - Perfect for cars, trucks, SUVs—your all-in-one emergency roadside essential.
BUILT TO BRAVE THE ELEMENTS - Durable, weather-resistant PVC insulation stays flexible in extreme heat or cold.

Goodyear Heavy Duty Jumper Cables feature 4 gauge wire for efficient energy transfer and a 16-foot length for versatile vehicle connection. Their weather-resistant PVC insulation ensures durability in extreme conditions, making them a reliable emergency roadside tool compatible with cars, trucks, and SUVs. Packaged with a sturdy carrying case, these cables combine power, convenience, and durability for every driver’s peace of mind.

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Manufacturer	Goodyear
Brand	Goodyear
Model	GY1069
Package Dimensions	39.5 x 25.6 x 9.19 cm; 2.21 kg
Item model number	GY1069
Exterior	Painted
Manufacturer part number	GY1069
Special Features	Extra Thick for Faster Charge
Item Weight	2.21 kg

Goodyear Heavy Duty Jumper Cables for Car Battery – 4 Gauge 16 ft Booster Cables with Carrying Case for Cars, Trucks, SUVs, Emergency Roadside Kit

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